cmdutils.c

   1 /*
   2  * Various utilities for command line tools
   3  * Copyright (c) 2000-2003 Fabrice Bellard
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <string.h>
  23 #include <stdlib.h>
  24 #include <errno.h>
  25 #include <math.h>
  26
  27 #include "config.h"
  28 #include "avformat.h"
  29 #include "avfilter.h"
  30 #include "avdevice.h"
  31 #include "cmdutils.h"
  32 #include "avstring.h"
  33 #include "version.h"
  34 #include "network.h"
  35
  36 #undef exit
  37
  38
  39 double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max)
  40 {
  41     char *tail;
  42     const char *error;
  43     double d = strtod(numstr, &tail);
  44     if (*tail)
  45         error= "Expected number for %s but found: %s\n";
  46     else if (d < min || d > max)
  47         error= "The value for %s was %s which is not within %f - %f\n";
  48     else if(type == OPT_INT64 && (int64_t)d != d)
  49         error= "Expected int64 for %s but found %s\n";
  50     else
  51         return d;
  52     fprintf(stderr, error, context, numstr, min, max);
  53     exit(1);
  54 }
  55
  56 int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration)
  57 {
  58     int64_t us = parse_date(timestr, is_duration);
  59     if (us == INT64_MIN) {
  60         fprintf(stderr, "Invalid %s specification for %s: %s\n",
  61                 is_duration ? "duration" : "date", context, timestr);
  62         exit(1);
  63     }
  64     return us;
  65 }
  66
  67 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
  68 {
  69     const OptionDef *po;
  70     int first;
  71
  72     first = 1;
  73     for(po = options; po->name != NULL; po++) {
  74         char buf[64];
  75         if ((po->flags & mask) == value) {
  76             if (first) {
  77                 printf("%s", msg);
  78                 first = 0;
  79             }
  80             av_strlcpy(buf, po->name, sizeof(buf));
  81             if (po->flags & HAS_ARG) {
  82                 av_strlcat(buf, " ", sizeof(buf));
  83                 av_strlcat(buf, po->argname, sizeof(buf));
  84             }
  85             printf("-%-17s  %s\n", buf, po->help);
  86         }
  87     }
  88 }
  89
  90 static const OptionDef* find_option(const OptionDef *po, const char *name){
  91     while (po->name != NULL) {
  92         if (!strcmp(name, po->name))
  93             break;
  94         po++;
  95     }
  96     return po;
  97 }
  98
  99 void parse_options(int argc, char **argv, const OptionDef *options,
 100                    void (* parse_arg_function)(const char*))
 101 {
 102     const char *opt, *arg;
 103     int optindex, handleoptions=1;
 104     const OptionDef *po;
 105
 106     /* parse options */
 107     optindex = 1;
 108     while (optindex < argc) {
 109         opt = argv[optindex++];
 110
 111         if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
 112           if (opt[1] == '-' && opt[2] == '\0') {
 113             handleoptions = 0;
 114             continue;
 115           }
 116             po= find_option(options, opt + 1);
 117             if (!po->name)
 118                 po= find_option(options, "default");
 119             if (!po->name) {
 120 unknown_opt:
 121                 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
 122                 exit(1);
 123             }
 124             arg = NULL;
 125             if (po->flags & HAS_ARG) {
 126                 arg = argv[optindex++];
 127                 if (!arg) {
 128                     fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
 129                     exit(1);
 130                 }
 131             }
 132             if (po->flags & OPT_STRING) {
 133                 char *str;
 134                 str = av_strdup(arg);
 135                 *po->u.str_arg = str;
 136             } else if (po->flags & OPT_BOOL) {
 137                 *po->u.int_arg = 1;
 138             } else if (po->flags & OPT_INT) {
 139                 *po->u.int_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT_MIN, INT_MAX);
 140             } else if (po->flags & OPT_INT64) {
 141                 *po->u.int64_arg = parse_number_or_die(opt+1, arg, OPT_INT64, INT64_MIN, INT64_MAX);
 142             } else if (po->flags & OPT_FLOAT) {
 143                 *po->u.float_arg = parse_number_or_die(opt+1, arg, OPT_FLOAT, -1.0/0.0, 1.0/0.0);
 144             } else if (po->flags & OPT_FUNC2) {
 145                 if(po->u.func2_arg(opt+1, arg)<0)
 146                     goto unknown_opt;
 147             } else {
 148                 po->u.func_arg(arg);
 149             }
 150         } else {
 151             if (parse_arg_function)
 152                 parse_arg_function(opt);
 153         }
 154     }
 155 }
 156
 157 void print_error(const char *filename, int err)
 158 {
 159     switch(err) {
 160     case AVERROR_NUMEXPECTED:
 161         fprintf(stderr, "%s: Incorrect image filename syntax.\n"
 162                 "Use '%%d' to specify the image number:\n"
 163                 "  for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
 164                 "  for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
 165                 filename);
 166         break;
 167     case AVERROR_INVALIDDATA:
 168         fprintf(stderr, "%s: Error while parsing header\n", filename);
 169         break;
 170     case AVERROR_NOFMT:
 171         fprintf(stderr, "%s: Unknown format\n", filename);
 172         break;
 173     case AVERROR(EIO):
 174         fprintf(stderr, "%s: I/O error occurred\n"
 175                 "Usually that means that input file is truncated and/or corrupted.\n",
 176                 filename);
 177         break;
 178     case AVERROR(ENOMEM):
 179         fprintf(stderr, "%s: memory allocation error occurred\n", filename);
 180         break;
 181     case AVERROR(ENOENT):
 182         fprintf(stderr, "%s: no such file or directory\n", filename);
 183         break;
 184     case AVERROR(FF_NETERROR(EPROTONOSUPPORT)):
 185         fprintf(stderr, "%s: Unsupported network protocol\n", filename);
 186         break;
 187     default:
 188         fprintf(stderr, "%s: Error while opening file\n", filename);
 189         break;
 190     }
 191 }
 192
 193 void show_banner(const char *program_name, int program_birth_year)
 194 {
 195     fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-2008 Fabrice Bellard, et al.\n",
 196             program_name, program_birth_year);
 197     fprintf(stderr, "  configuration: " FFMPEG_CONFIGURATION "\n");
 198     fprintf(stderr, "  libavutil version: " AV_STRINGIFY(LIBAVUTIL_VERSION) "\n");
 199     fprintf(stderr, "  libavcodec version: " AV_STRINGIFY(LIBAVCODEC_VERSION) "\n");
 200     fprintf(stderr, "  libavformat version: " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\n");
 201     fprintf(stderr, "  libavdevice version: " AV_STRINGIFY(LIBAVDEVICE_VERSION) "\n");
 202 #if ENABLE_AVFILTER
 203     fprintf(stderr, "  libavfilter version: " AV_STRINGIFY(LIBAVFILTER_VERSION) "\n");
 204 #endif
 205     fprintf(stderr, "  built on " __DATE__ " " __TIME__);
 206 #ifdef __GNUC__
 207     fprintf(stderr, ", gcc: " __VERSION__ "\n");
 208 #else
 209     fprintf(stderr, ", using a non-gcc compiler\n");
 210 #endif
 211 }
 212
 213 void show_version(const char *program_name) {
 214      /* TODO: add function interface to avutil and avformat avdevice*/
 215     printf("%s " FFMPEG_VERSION "\n", program_name);
 216     printf("libavutil   %d\n"
 217            "libavcodec  %d\n"
 218            "libavformat %d\n"
 219            "libavdevice %d\n",
 220            LIBAVUTIL_BUILD, avcodec_build(), LIBAVFORMAT_BUILD, LIBAVDEVICE_BUILD);
 221 }
 222
 223 void show_license(void)
 224 {
 225 #ifdef CONFIG_NONFREE
 226     printf(
 227     "This version of FFmpeg has nonfree parts compiled in.\n"
 228     "Therefore it is not legally redistributable.\n"
 229     );
 230 #elif CONFIG_GPL
 231     printf(
 232     "FFmpeg is free software; you can redistribute it and/or modify\n"
 233     "it under the terms of the GNU General Public License as published by\n"
 234     "the Free Software Foundation; either version 2 of the License, or\n"
 235     "(at your option) any later version.\n"
 236     "\n"
 237     "FFmpeg is distributed in the hope that it will be useful,\n"
 238     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 239     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
 240     "GNU General Public License for more details.\n"
 241     "\n"
 242     "You should have received a copy of the GNU General Public License\n"
 243     "along with FFmpeg; if not, write to the Free Software\n"
 244     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 245     );
 246 #else
 247     printf(
 248     "FFmpeg is free software; you can redistribute it and/or\n"
 249     "modify it under the terms of the GNU Lesser General Public\n"
 250     "License as published by the Free Software Foundation; either\n"
 251     "version 2.1 of the License, or (at your option) any later version.\n"
 252     "\n"
 253     "FFmpeg is distributed in the hope that it will be useful,\n"
 254     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
 255     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n"
 256     "Lesser General Public License for more details.\n"
 257     "\n"
 258     "You should have received a copy of the GNU Lesser General Public\n"
 259     "License along with FFmpeg; if not, write to the Free Software\n"
 260     "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n"
 261     );
 262 #endif
 263 }